/** @preserve
 * A class to parse color values
 * @author Stoyan Stefanov <sstoo@gmail.com>
 * @link   http://www.phpied.com/rgb-color-parser-in-javascript/
 * @license Use it if you like it
 */
(function (global) {
    function RGBColor(color_string) {
        this.ok = false;

        // strip any leading #
        if (color_string.charAt(0) == '#') { // remove # if any
            color_string = color_string.substr(1, 6);
        }

        color_string = color_string.replace(/ /g, '');
        color_string = color_string.toLowerCase();

        // before getting into regexps, try simple matches
        // and overwrite the input
        var simple_colors = {
            aliceblue: 'f0f8ff',
            antiquewhite: 'faebd7',
            aqua: '00ffff',
            aquamarine: '7fffd4',
            azure: 'f0ffff',
            beige: 'f5f5dc',
            bisque: 'ffe4c4',
            black: '000000',
            blanchedalmond: 'ffebcd',
            blue: '0000ff',
            blueviolet: '8a2be2',
            brown: 'a52a2a',
            burlywood: 'deb887',
            cadetblue: '5f9ea0',
            chartreuse: '7fff00',
            chocolate: 'd2691e',
            coral: 'ff7f50',
            cornflowerblue: '6495ed',
            cornsilk: 'fff8dc',
            crimson: 'dc143c',
            cyan: '00ffff',
            darkblue: '00008b',
            darkcyan: '008b8b',
            darkgoldenrod: 'b8860b',
            darkgray: 'a9a9a9',
            darkgreen: '006400',
            darkkhaki: 'bdb76b',
            darkmagenta: '8b008b',
            darkolivegreen: '556b2f',
            darkorange: 'ff8c00',
            darkorchid: '9932cc',
            darkred: '8b0000',
            darksalmon: 'e9967a',
            darkseagreen: '8fbc8f',
            darkslateblue: '483d8b',
            darkslategray: '2f4f4f',
            darkturquoise: '00ced1',
            darkviolet: '9400d3',
            deeppink: 'ff1493',
            deepskyblue: '00bfff',
            dimgray: '696969',
            dodgerblue: '1e90ff',
            feldspar: 'd19275',
            firebrick: 'b22222',
            floralwhite: 'fffaf0',
            forestgreen: '228b22',
            fuchsia: 'ff00ff',
            gainsboro: 'dcdcdc',
            ghostwhite: 'f8f8ff',
            gold: 'ffd700',
            goldenrod: 'daa520',
            gray: '808080',
            green: '008000',
            greenyellow: 'adff2f',
            honeydew: 'f0fff0',
            hotpink: 'ff69b4',
            indianred: 'cd5c5c',
            indigo: '4b0082',
            ivory: 'fffff0',
            khaki: 'f0e68c',
            lavender: 'e6e6fa',
            lavenderblush: 'fff0f5',
            lawngreen: '7cfc00',
            lemonchiffon: 'fffacd',
            lightblue: 'add8e6',
            lightcoral: 'f08080',
            lightcyan: 'e0ffff',
            lightgoldenrodyellow: 'fafad2',
            lightgrey: 'd3d3d3',
            lightgreen: '90ee90',
            lightpink: 'ffb6c1',
            lightsalmon: 'ffa07a',
            lightseagreen: '20b2aa',
            lightskyblue: '87cefa',
            lightslateblue: '8470ff',
            lightslategray: '778899',
            lightsteelblue: 'b0c4de',
            lightyellow: 'ffffe0',
            lime: '00ff00',
            limegreen: '32cd32',
            linen: 'faf0e6',
            magenta: 'ff00ff',
            maroon: '800000',
            mediumaquamarine: '66cdaa',
            mediumblue: '0000cd',
            mediumorchid: 'ba55d3',
            mediumpurple: '9370d8',
            mediumseagreen: '3cb371',
            mediumslateblue: '7b68ee',
            mediumspringgreen: '00fa9a',
            mediumturquoise: '48d1cc',
            mediumvioletred: 'c71585',
            midnightblue: '191970',
            mintcream: 'f5fffa',
            mistyrose: 'ffe4e1',
            moccasin: 'ffe4b5',
            navajowhite: 'ffdead',
            navy: '000080',
            oldlace: 'fdf5e6',
            olive: '808000',
            olivedrab: '6b8e23',
            orange: 'ffa500',
            orangered: 'ff4500',
            orchid: 'da70d6',
            palegoldenrod: 'eee8aa',
            palegreen: '98fb98',
            paleturquoise: 'afeeee',
            palevioletred: 'd87093',
            papayawhip: 'ffefd5',
            peachpuff: 'ffdab9',
            peru: 'cd853f',
            pink: 'ffc0cb',
            plum: 'dda0dd',
            powderblue: 'b0e0e6',
            purple: '800080',
            red: 'ff0000',
            rosybrown: 'bc8f8f',
            royalblue: '4169e1',
            saddlebrown: '8b4513',
            salmon: 'fa8072',
            sandybrown: 'f4a460',
            seagreen: '2e8b57',
            seashell: 'fff5ee',
            sienna: 'a0522d',
            silver: 'c0c0c0',
            skyblue: '87ceeb',
            slateblue: '6a5acd',
            slategray: '708090',
            snow: 'fffafa',
            springgreen: '00ff7f',
            steelblue: '4682b4',
            tan: 'd2b48c',
            teal: '008080',
            thistle: 'd8bfd8',
            tomato: 'ff6347',
            turquoise: '40e0d0',
            violet: 'ee82ee',
            violetred: 'd02090',
            wheat: 'f5deb3',
            white: 'ffffff',
            whitesmoke: 'f5f5f5',
            yellow: 'ffff00',
            yellowgreen: '9acd32'
        };
        for (var key in simple_colors) {
            if (color_string == key) {
                color_string = simple_colors[key];
            }
        }
        // emd of simple type-in colors

        // array of color definition objects
        var color_defs = [
            {
                re: /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/,
                example: ['rgb(123, 234, 45)', 'rgb(255,234,245)'],
                process: function (bits) {
                    return [
                        parseInt(bits[1]),
                        parseInt(bits[2]),
                        parseInt(bits[3])
                    ];
                }
            },
            {
                re: /^(\w{2})(\w{2})(\w{2})$/,
                example: ['#00ff00', '336699'],
                process: function (bits) {
                    return [
                        parseInt(bits[1], 16),
                        parseInt(bits[2], 16),
                        parseInt(bits[3], 16)
                    ];
                }
            },
            {
                re: /^(\w{1})(\w{1})(\w{1})$/,
                example: ['#fb0', 'f0f'],
                process: function (bits) {
                    return [
                        parseInt(bits[1] + bits[1], 16),
                        parseInt(bits[2] + bits[2], 16),
                        parseInt(bits[3] + bits[3], 16)
                    ];
                }
            }
        ];

        // search through the definitions to find a match
        for (var i = 0; i < color_defs.length; i++) {
            var re = color_defs[i].re;
            var processor = color_defs[i].process;
            var bits = re.exec(color_string);
            if (bits) {
                channels = processor(bits);
                this.r = channels[0];
                this.g = channels[1];
                this.b = channels[2];
                this.ok = true;
            }

        }

        // validate/cleanup values
        this.r = (this.r < 0 || isNaN(this.r)) ? 0 : ((this.r > 255) ? 255 : this.r);
        this.g = (this.g < 0 || isNaN(this.g)) ? 0 : ((this.g > 255) ? 255 : this.g);
        this.b = (this.b < 0 || isNaN(this.b)) ? 0 : ((this.b > 255) ? 255 : this.b);

        // some getters
        this.toRGB = function () {
            return 'rgb(' + this.r + ', ' + this.g + ', ' + this.b + ')';
        }
        this.toHex = function () {
            var r = this.r.toString(16);
            var g = this.g.toString(16);
            var b = this.b.toString(16);
            if (r.length == 1) r = '0' + r;
            if (g.length == 1) g = '0' + g;
            if (b.length == 1) b = '0' + b;
            return '#' + r + g + b;
        }

        // help
        this.getHelpXML = function () {

            var examples = new Array();
            // add regexps
            for (var i = 0; i < color_defs.length; i++) {
                var example = color_defs[i].example;
                for (var j = 0; j < example.length; j++) {
                    examples[examples.length] = example[j];
                }
            }
            // add type-in colors
            for (var sc in simple_colors) {
                examples[examples.length] = sc;
            }

            var xml = document.createElement('ul');
            xml.setAttribute('id', 'rgbcolor-examples');
            for (var i = 0; i < examples.length; i++) {
                try {
                    var list_item = document.createElement('li');
                    var list_color = new RGBColor(examples[i]);
                    var example_div = document.createElement('div');
                    example_div.style.cssText =
                        'margin: 3px; '
                        + 'border: 1px solid black; '
                        + 'background:' + list_color.toHex() + '; '
                        + 'color:' + list_color.toHex()
                    ;
                    example_div.appendChild(document.createTextNode('test'));
                    var list_item_value = document.createTextNode(
                        ' ' + examples[i] + ' -> ' + list_color.toRGB() + ' -> ' + list_color.toHex()
                    );
                    list_item.appendChild(example_div);
                    list_item.appendChild(list_item_value);
                    xml.appendChild(list_item);

                } catch (e) {
                }
            }
            return xml;

        }

    }

    if (typeof define === "function" && define.amd) {
        define(function () {
            return RGBColor;
        });
    } else if (typeof module !== "undefined" && module.exports) {
        module.exports = RGBColor;
    } else {
        global.RGBColor = RGBColor;
    }
    return RGBColor;
})(typeof self !== "undefined" && self || typeof window !== "undefined" && window || this);
